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Finding the Fourth Proportional to 638,236.26, 880,606.89 and 405,578.34

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Solution

The fourth proportional to 638,236.26, 880,606.89 and 405,578.34 is: 559,596.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,236.26 : 880,606.89 = 405,578.34 : x
  2. Step 2: Convert to fraction form
    638,236.26/880,606.89 = 405,578.34/x
  3. Step 3: Cross multiply
    638,236.26x = 880,606.89 × 405,578.34
  4. Step 4: Simplify right side
    638,236.26x = 357,155,080,638.76
  5. Step 5: Solve for x
    x = 357,155,080,638.76/638,236.26
  6. Step 6: Final answer
    x = 559,596.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.